matthie



(No Model.) I

. W. A. O. MATTHIE.

PIANO STOOL. No. 316,281. Patented Apr. 21, I885.

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WILLIAM A. o. MATTHIE, OFHMONTREAL, QUEBEC, CANADA.

PIANO-STOOL.

SPECIFICATION forming part of Letters Patent No.- 316,281, dated April21, 1885.

Application filed December 5, 1884. (No model.) Patented in Canada,November 29, 1884, No. 20,670.

To all whom it mag concern.-

Be it known that I, WILLIAM AUGUSTUS CHAPMAN MATTHIE, of the city ofMontreal, in the county of Hochelaga, in the Province of Quebec, Canada,gentleman, have invented a certain new and useful Device for Elevatingand Securing in any Desired Position Piano- Stools and other AnalogousExtensible Articles; and I do hereby declare that the following is afull, clear, and exact description of the same. I

The invention relates to piano-stools or other analogous articles; andit consists in the peculiar combinations and the construction andarrangement of parts, hereinafter more fully described and claimed.

Figure 1 is a-sectional elevation of a music stool provided with myimproved device. Fig. 2 is an enlarged detail, partially in section,showing the locking portion of the device.

As will be understood on reference to the drawings, the device which Ishall now describe is not only applicable to piano-stools, asillustrated, but is also of equal value in extensible chairs, footrests, tables, readingdesks, drawing-tables, photographers headrests,reading and music stands, and, in'fact, in any article arranged to beextensible; but for the purpose of this description it will besufiicient to show its application to a single article, and I havetherefore chosen a musicstool for that purpose.

A represents the seat of the music-stool connected to a spindle, B. Thisspindle fits in the usual way into an annular chamber formed in thestand 0. At the bottom of the chamber I place a spiral spring, .D, ofsuffispiral spring acts on one end against the collar f, formed on thespindle F. The other end of the spring rests against the back of thebracket G, which is designed, as illustrated in Fig. 2, to receive thebolt E.

H is a pivoted pawl fitted behind the 001- lar f, and attached to thehandle I. When this handle is pressed down, the bolt E will naturally bedrawn back, and .if it is fitting into one of the annular grooves a thisaction withdraws it and permits the spindle B to move freelylongitudinally within its chamber. As soon as the handle I is presseddown so as to withdraw the bolt E from the groove a, into which chamberit may at the time be fitting, the power of the spring D causes thespindle to ascend, raising the same until the bolt E is permitted, bythe release of the handle I, to spring into one of the annulargrooves,when the spindle B will be securely held from movinglongitudinally, and at the same time the seat A may be revolved freely.The top of the stand 0 is provided with a flanged sleeve, J, which fitsinto the chamber in which the spindle B is inserted. This sleeve J has anotch out in it to receive the end of the bracket G when inserted inposition, which prevents the said sleeve revolving with the spindle.

With the view of operating the device by foot I provide a foot-treadle,K, which I connect by the rod L to the lever I, so that by pressing onthis foot-lever K thesame effect will be produced as though the lever Iwere operated by hand.

I am aware of the Patents Nos. 123,172 and 208,000, and make no claim tothe construction shown therein as forming part of my invention.

I attach importance to my flanged sleeve J, the use of which preventswearing of the stand and thus avoids wabbling of the spindle and seat,and also insures a closer contact between the bolt E and the groove inthe spindle.

What I claim as my invention is 1. In a revolving stool or chair, thecombination, with the stand 0, spindle B, having annular grooves a, andthe flanged sleeve J, inserted in a socket in said stand, of the bracketG, secured in a recess in said stand, the

Lworking through a slot in said bracket, substantially as and for thepurpose specified.

stand 0, spring D, and spring-actuated bolt E, of the pawl H,operating-lever I, the footing-actuated bolt E,carried by said brack- Itreadle K, and the rod L, substantially as and the pivoted pawl H, andoperating-lever for the purposes specified.

Toronto, November 24, 1884.

W. A. 0. MATTHIE.

. The combination, with the spindle B, In presence 0f-;-

O. O. BALfiWIN,

JAS. E. MLYBEE.

